City Building Permits
Castle Rock, WA Building Permit Guide
How to apply for a building permit in Castle Rock, Washington. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
All properties within the incorporated City of Castle Rock.
- Department
- Castle Rock Community Development Department / Building and Planning Department
- Address
- 141 A Street SW, Castle Rock, WA 98611
- Phone
- (360) 274-8181
Online Permit Portal
Platform: Paper-based application system • Account required: No • Submission: In-person only
Application Process
- Determine your project type (Type I, II, III, or IV) based on complexity.
- Submit application to City Clerk-Treasurer's office on forms provided by the City.
- Include all required site plan and documentation for your project type.
- Pay required application and review fees.
- City Clerk-Treasurer's office routes application to appropriate review bodies.
- Receive decision and, if approved, proceed to building permit stage if applicable.
- Submit building permit application after site plan approval (if required).
Typical processing time: Type I (single-family/minor projects): 10 working days from complete application. Type II/III/IV: Varies; includes committee review.
Source: Castle Rock Community Development Department / Building and Planning Department
General Requirements
Building permits are required for all construction within the City of Castle Rock.
Required Documents
- Completed application on City-provided forms
- Site plan (if applicable, showing legal description, property lines, building locations, setbacks, utilities, drainage, natural features)
- Construction plans and specifications
- Payment of application and review fees
- Permit validity
- Site plan approval expires in 6 months (one 6-month extension available).
- Building code
- 2021 International Building Code (IBC) with Washington State amendments; 2021 International Residential Code (IRC); assumed baseline codes consistent with county adoption, though not explicitly verified
- Contractor requirements
- Contractors must comply with City of Castle Rock requirements and maintain appropriate registration.
Fees
- Minimum permit fee
- Established by City resolution
- Plan check fee
- Contact City Hall for plan review fee percentages
- Permit fee formula
- Fees established by City resolution. Contact City Hall for current fee schedule.
- Payment note
- Contact City Hall at (360) 274-8181 for current fee schedule and payment methods.
Work That Does NOT Require a Permit
Contact the Castle Rock Community Development Department / Building and Planning Department to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
- (360) 274-8181 (phone)
Typical inspection sequence: Inspections required throughout construction. Final inspection required for occupancy.
Additional Resources
- Building code: 2021 International Building Code (IBC) with Washington State amendments; 2021 International Residential Code (IRC); assumed baseline codes consistent with county adoption, though not explicitly verified
- Verify contractor license: WA L&I Contractor Lookup
- Castle Rock Municipal Code Title 17 (Zoning)
- Castle Rock Municipal Code Title 16 (Subdivision)
- License lookup guide: Washington Contractor License Requirements
- Contract template: Washington Homeowner-Contractor Agreement
- Washington hub: Washington Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Castle Rock Community Development Department / Building and Planning Department before applying.
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